<template>
  <!-- 底部部分 -->
  <footer class="footer">
    <span class="todo-count">剩余<strong>{{ totalCount }}</strong></span>
    <ul @click="$emit('changeType', type)" class="filters">
      <li>
        <a @click="type = 'all'" :class="{ selected: type === 'all' }" href="#/">全部</a>
      </li>
      <li>
        <a @click="type = 'no'" :class="{ selected: type === 'no' }" href="#/active">进行中</a>
      </li>
      <li>
        <a @click="type = 'yes'" :class="{ selected: type === 'yes' }" href="#/completed">已完成</a>
      </li>
    </ul>
    <button @click="hClear" v-show="showClear" class="clear-completed">清除已完成</button>
  </footer>
</template>

<script>
export default {
  props: {
    list: {
      type: Array,
      required: true
    }
  },
  data() {
    return {
      type: 'all'
    }
  },
  methods: {
    hClear() {
      this.$emit('clearDone')
    }
  },
  computed: {
    totalCount() {
      return this.list.length
    },
    showClear() {
      return this.list.some(item => item.isDone)
    }
  }
}
</script>

<style>

</style>